At a small playground earlier - designed for 7 and under (sign on the gate) DS (3) was playing with the sand and got in an older boy's way (he must have been about 9 - 10). older boy threatened as above. I told him not to do that and it wasn't a very nice thing to say, and would he like it if someone threatened to throw sand in his eye? his parents told me not to tell their son off and then frowned at me until they left the playground.